redb: add wasm32 support

Signed-off-by: Yuki Kishimoto <[email protected]>

Author: yukibtc

crates/nostr-redb/src/lib.rs

@@ -10,6 +10,7 @@
 #![allow(clippy::mutable_key_type)]
 
 use std::collections::HashSet;
+#[cfg(not(target_arch = "wasm32"))]
 use std::path::Path;
 
 use nostr_database::prelude::*;
@@ -31,6 +32,7 @@ pub struct NostrRedb {
 impl NostrRedb {
     /// Persistent database
     #[inline]
+    #[cfg(not(target_arch = "wasm32"))]
     pub fn persistent<P>(path: P) -> Result<Self, DatabaseError>
     where
         P: AsRef<Path>,
@@ -55,7 +57,8 @@ impl NostrRedb {
     }
 }
 
-#[async_trait]
+#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
+#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
 impl NostrDatabase for NostrRedb {
     #[inline]
     fn backend(&self) -> Backend {
@@ -73,7 +76,8 @@ impl NostrDatabase for NostrRedb {
     }
 }
 
-#[async_trait]
+#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
+#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
 impl NostrEventsDatabase for NostrRedb {
     #[inline]
     async fn save_event(&self, event: &Event) -> Result<SaveEventStatus, DatabaseError> {

crates/nostr-redb/src/store/core/mod.rs

@@ -4,10 +4,13 @@
 // Distributed under the MIT software license
 
 use std::collections::BTreeSet;
+#[cfg(not(target_arch = "wasm32"))]
+use std::fs;
+use std::iter;
 use std::ops::Bound;
+#[cfg(not(target_arch = "wasm32"))]
 use std::path::Path;
 use std::sync::Arc;
-use std::{fs, iter};
 
 use nostr::prelude::*;
 use nostr_database::flatbuffers::FlatBufferDecodeBorrowed;
@@ -58,6 +61,7 @@ impl Db {
         Ok(Self { env })
     }
 
+    #[cfg(not(target_arch = "wasm32"))]
     pub(crate) fn persistent<P>(path: P) -> Result<Self, Error>
     where
         P: AsRef<Path>,
@@ -72,6 +76,7 @@ impl Db {
         Self::new(env)
     }
 
+    // TODO: add support to in-memory with limited capacity?
     pub(crate) fn in_memory() -> Result<Self, Error> {
         let backend = InMemoryBackend::new();
         let env = Arc::new(Database::builder().create_with_backend(backend)?);

crates/nostr-redb/src/store/mod.rs

@@ -4,6 +4,7 @@
 // Distributed under the MIT software license
 
 use std::collections::BTreeSet;
+#[cfg(not(target_arch = "wasm32"))]
 use std::path::Path;
 use std::sync::Arc;
 
@@ -30,6 +31,7 @@ pub struct Store {
 }
 
 impl Store {
+    #[cfg(not(target_arch = "wasm32"))]
     pub fn persistent<P>(path: P) -> Result<Self, Error>
     where
         P: AsRef<Path>,